Hoisting-machine



(No Model.) 2 Sheets.-Sheet 1. k

P. H. A. PETERS.

HOISTING MACHINE.

Patented Oct. 5

L;J WITNESSES INVENTOR ATTORNEYS N. PETERS. Phntoljllwgnphcr. Washington. D. C.

2 Sheets-Sheet 2;

(No Model.)

I. H. A. PETERS.

S HOISTING MACHINE.

mvm gom fl QQ v ATTORNEYS.

Patented Oct. 5, 1886.

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HNNMWS M Q S u WITNESSES:

NITED STATES PATENT FFICE.

FRIEDRICH HERMAN AUGUST PETERS, OF DETROIT, MICHIGAN.

HOISTING -MACHINE.

SPECIFICATION forming part of Letters Patent No. 350,268, dated October 5, 1886. Application filed June 17, 1886. Serial No. 205,474. (No model.)

To all whom it may concern.-

Be it known that I, Fnrnnnrcn HERMAN AUGUST PETERS, of Detroit, in the county of WVayne and the State of Michigan, have i nvcnted a new and Improved H oisting-ltlachine, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved hoisting-machine which is durable in construction and effective in operation.

The invention consists of two sets of pawls engaging teeth on the main hoisting-dru1n, of devices for operating the said pawls, and of a brake attachment.

The invention also consists of various parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both figures.

Figure l is a sectional side elevation of my improvement on the line at 00, Fig. 2, and Fig. 2 is a plan view of thesamc, parts being broken out.

The hangers A, of suitable construction, are attached to either the ceiling of the building or to an especiallyconstructed frame, A, erected in the said building.

On the shaft B, supported by hangers A, is mounted the hoisting-drum B, to which is secured one end of a hoisting-rope, G.

On the periphery of the drum B, at each end, are formed ratchet-teeth D, which engage at each end of the said drum with pawls E, fulcrumed on the rod F, secured to the bifurcated balanced lever G, fulcrun'ied on the shaft B on the collars A ofthe hangers A, and carrying the adjustable weights G. Each of the pawls E is connected at its upper end, E, by a link, H, with a forked lever, I, fulcrumed on the rod J, attached to the hoisting le"er K, pivoted to the hangers A, and carrying on its outer end the handle K. The rods F and J are connected with each other at each end by a link, F.

To the lower end, I, of the forked lever I is secured a rope or chain, L, which passes over the pulleys L and L mounted on the hoistinglever K, and then passes downward, and is provided on its lower end with a handle or ball, L", adapted to be held in a locked position by being placed under the recessed arm M of the bracket M, secured to the handle K.

In each recessed end of the drum B is placed a friction-brake, N which consists of the brake arms or shoes N, pivoted at N 2 to the hangers A, and connected by the links N with the arm 0, pivotal] y attached to one end of the lever O, fulcrumed on the stay'O secured to the hangers A. The other end of the lever O is connected by means of the link 0 with the brakelever P, pivoted at P to the hangers A. Each fork of the lever P carries at its rear end a balancing-weight, P and the front ends of the said fork are bent to form one arm,which carries at its outer end the handle P. On each side of the stay-rod O is fulcrumed a pawl, Q, having double teeth on its lower end, Q, which can be thrown into and out of contact with the teeth D on the drum B.

To the lower end, Q, of each of the pawls Q is pivotally attached a link, R, connected to the arm R, pivoted to the brake-lever P, and provided with the stay-pin R", which limits the upward movement of the link R, and consequently that of the pawl Q. To the lower ends, Q, of the pawls Q is also pivotally attached the forked frame S, which is provided in its center with the weight S, to which is secured one end of the the rope T, which passes upward and over the pulleys T and T secured to the frame-work A, and the rope T then passes downward, and is provided on its lower end with a ring, T, adapted to be placed over or attached to a stud or cleat, T, secured to the frame A. Thedownward motion of the forked frame S is limited by a stop-pin, S", secured to each of the hangers A. The hoisting-drum B may be grooved.

The operation is as follows: The weight to be raised or lowered is attached to the end of the rope O in any desired manner. The machine, as shown in Fig. 1, is in a position to raise the weight, which is done by moving the handle K up and down. In the upward motion of the handle K the pawls E glide over the teeth D on the drum B, which, with its weight, is held in position by the pawls which are in contact with the said teeth. D. In the downward movement of the handle K ICO the drum B is turned in the direction of the arrow to by the pawls E engaging the teeth D, while the pawls Q glide over the same. The rope G is thus wound upon the drum, and the weight is raised to any desired height. The weight can be lowered from anyheight by disengaging the ring T from the stud T, which causes the weighted forked arm S to drop and rest on the stop-pins S". The operator now takes hold of the handle K and pulls the lever K down a short distance, so that the pawls Q disengage the teeth D, and the weighted frame S causes the pawls Q to swing upward clear from the teeth D on tlie drum B. The handle K is then moved gradually upward again, so that the curved ends E of the pawls E strike the frame S and raise the same sufficiently for the pawls Q to engage the teeth D of the drum. The handle K is pushed a trifle higher, so as to loosen the pawls E, and by now pulling on the rope L and pressing the ball. L under the recessed arm M. the pawls E are held clear from the teeth D. The handle K is then moved downward as low as possible, after which the operator disengages the ball If from the recessed arm M, so that the pawls E drop into contact with the teeth 1). A slight pull on the handle R will cause the drum B to revolve a short distance, so that the upper pawls, Q, are thrown out of contact with the teeth D by the action of the weighted arm S on the said pawls, the weighted arm swinging on the pins S as a fulcrum. The handle K is now moved upward,which causes the drum B to turn in the inverse direction of the arrow to, and the weight islowered until the ends E of the pawls E again raise the weighted frame S so that the pawls Q engage the teeth of the drum, which is then held in position until the above-described motion with the handle K is repeated. In this manner the weight on the rope O is lowered any desired distance. The brake device for lowering is used by first pulling on the handle 1i with the right hand, so that the pawls Q loosen enough to clear the teeth D, and then pulling the brake-lever 1? down with the left hand, so that the brakeshoes N engage with and hold the drum B and its suspended weight in position, and by disengaging the pawls E by pulling on the rope L and placing the ball L in a locked position under the recessed arm M the pawls Q are at the same time disengaged by the downward movement of the lever P by means of the links 1t,pivotcd to the pawls Q and to the links R, which are pivoted to the lever P. The operator can then lower the weight as fast as desired by a slight upward motion of the brake-lever I", which disengagcs the brakeshoes N from the drum. If both sets of pawls Q and. E are disengaged from. the teeth D of the drum B, so that the drum is free to revolve, then the operator is enabled to raise or lower light articles attached to the hoistingrope O by pulling on the endless rope, (not shown,)which runs over a ropc-whcel, X, said.

rope-wheel being located. on the outside of the hanger A and fastened to the shaft B. If both sets of pawls Q and E are disengaged from the teeth D of the drum, as before described, so that the drum is free to revolve, then the oporator' is enabled to let the empty rope C be drawn up by a counter-weight, V, to an y height he desires. Wherever the counterweight V is located there can be a stop which will allow the weight to rcston said stop, to prevent the hoisti ng-rope G from running over the drum in winding up. Said. counter-weight V is attached to a rope which passes over a.

pulley, V", and attached to the drum V. Said drum is located onv the outside of the hanger, and is fastened to the shaft 13.

For raising very heavy articles I connect the hoisting-lever K by a link, "W, with the lever V, 'i'uleruined on the standard \Vflattached to the floor of the building.

Having thus fully described-my invention, I claim as new and desire to secure by letters Patent 1. In a hoisting-machine, the drum 1), provided with. the ratchet-teeth D, in combination with the pawls Q, the pawls E, and the hoisting-lever K, substantially as shown and described.

2. In a hoistinginachine, the hoistingdrnm B, provided with the teeth D and means for operating it, in combination with the pawls Q and the weighted frame S, pivoted to the said pawls Q, substantially as shown. and d cscribed.

3. In. a llOlStillgfllltlelllHO, the hoisting-drum B, provided with the teeth D, in combination with the pawls Q, the weighted frame S, pivoted to the said pawls Q, the rope T, attached to the said frame S and passing over the pulleys T and T the ring T attached. to the said rope T and adapted to be connected with the stud T", and the stop-pins S, substantially as shown and described.

4. 111 a hoisting-machine, the toothed. hoisting-drum, the pawls Q, engaging the teeth thereof, the weighted frame S, attached to the said pawls Q, and the stop-pins in combination with the pawls E, having the crl'n'vcd. ends E, and the hoisting-lever K, subtantially as shown and described.

5. In a hoisting-machine, the hoisting-drum 13, provided with the teeth D, in combination with the pawls E, fulcrunled on the rod F, secured to the balanced lever G, the forked frain c I, connected by the link J with the said pawl E, the hoisting-lever K, and the rope L, provided with a locking device, substantially as shown and described.

6. In a hoistirig-machine, the toothed hoistingdruni, balanced lever G, fulcrnnied on the collar A, the rod or stay F, the pawls E, fulcrumed on the said rod F, and the links F, in combination with the forked frame I, connected by the links H with the pawls E, the hoist inglevcr K, connected by the links F with the balanced lever G, and. the rope L, attached to the forked frame I and provided with a locking device, substantially as shown and described.

7 I11 a hoisting-machine, the toothed hoisting-drum, the pawls E, engaging the teeth thereof and fulcrnmed on the stay F of the balanced lever G, the forked frame I, connected by the links H with the pawlsE and fulcrumed on the rod J of the balanced lever K, in combination with the rope L, secured to the end I of the frame I and passing over the pulleys L and L the ball L,attachcd to the said rope ,L, and the arm M, for locking said ball in position, substantially as shown and described.

8. In a hoisting-machine, the drum B, having recessed ends, in combination with the brake device N, connected by the link 0 with the lever O, and the balanced brake-arm P,

FRIEDRICH HERMAN AUGUST PETERS.

Witnesses:

D. DUFF, ANTON GIPPERIECH. 

